Adjusting Procedure; Idle Speed Adjustment; Mixture Adjustment; Acceleration Check - Craftsman 358.797961-22cc Operator's Manual

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SERVICE AND ADJUSTMENTS
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ADJUSTING PROCEDURE [_
CAUTION; A carburetor setting that
is too lean (clockwise adjusfment
on
mixture speed
screw for maxi-
mum
speed)
wilt cause
engine
dam-
age=to any 2-cycle engine
trom
overheatinqand
lack of lubrication.
Never set
the mixture speed screw
so
far
clockwise that
.you have high
engine
speed lacking power to
operate,
an effective
approach
fol-
lOWS.
IDLE SPEED ADJUSTMENT
• Allow warm engine tO idfe. If engine wil[not idle, turn
idle speed screw clockwise until the engine runs with-
out stalling. Stop here if performance is satisfactory.
• Turn screw clockwise to increase engine speed.
• Turn screw counterclockwise to stow engine down.
• If you feel further adjustments are necessary, pro-
ceed to following sections.
MIXTURE ADJUSTMENT
NOTE: The unit must be operated at full throttle through-
out the mixture adjustment procedure.
• Turn the mixture screw (Fig. 15) counterclockwise until
it stops, if the engine accelerates and runs smoothly,
no further adjustments are necessary, if not continue
to next step.
• Turn the screw slowly the minimum amount clockwise
until the engine runs smoothly.
• If the engine accelerates and runs smoothly, no further
adjustments are necessary.
ACCELERATION CHECK
• if the engine dies or hesitates when accelerating, turn
the mixture screw the width of the slot in the adjusting
screw counterclockwise until you have smooth accel-
eration.
• Check the idle speed for stability, adjust as necessary.
• Recheck for smooth acceleration and stable idle.
Repeat process as necessary for acceptable perfor-
mance.
--Turn mixture speed screw clockwise
until engine loses power while operat-
ing,
-Turn mixture speed screw the width of
the slot in the adjusting screw counter-
clockwise until the engine has power
and runs smoothly while operating.
If the engine does not operate
according to these instructions
after repeating the adjusting steps,
do not use the unit. For further
ssistance, please call our
ustomer Assistance Hotline at 1-
800-235-5878.
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